Potentilla anserina L.(PA)belongs to the Rosaceae family,is a common edible plant in the Qinghai-Tibet Plateau areas of China.This study elucidates the mechanism upon which crude polysaccharide of PA(PAP)on fat accumu...Potentilla anserina L.(PA)belongs to the Rosaceae family,is a common edible plant in the Qinghai-Tibet Plateau areas of China.This study elucidates the mechanism upon which crude polysaccharide of PA(PAP)on fat accumulation in HepG2 cells stimulated by oleic acid(OA)and high fat high sugar induced mice.The result revealed that PAP inhibited lipid accumulation in obese mice and ameliorated the degree of damage in OA-induced HepG2 cells.Specifically,compared to the control group,the TG and TC levels were decreased in cells and mice serum,the aspartate transaminase and alamine aminotransferase contents were declined in liver of obese mice by PAP treatment.The expressions of adipogenic genes of SREBP-1c,C/EBPα,PPARγ,and FAS were inhibited after PAP treatment.Moreover,PAP increased the mRNA levels of CPT-1 and PPARα,which were involved in fatty acid oxidation.The present results indicated the PAP could alleviate the damage of liver associated with obesity and PAP treatment might provide a dietary therapeutic option for the treatment of hyperlipidemia.展开更多
Oxidative stress plays a crucial role in cadmium(Cd)-induced myocardial injury.Mitsugumin 53(MG53)and its mediated reperfusion injury salvage kinase(RISK)pathway have been demonstrated to be closely related to myocard...Oxidative stress plays a crucial role in cadmium(Cd)-induced myocardial injury.Mitsugumin 53(MG53)and its mediated reperfusion injury salvage kinase(RISK)pathway have been demonstrated to be closely related to myocardial oxidative damage.Potentilla anserina L.polysaccharide(PAP)is a polysaccharide with antioxidant capacity,which exerts protective effect on Cd-induced damage.However,it remains unknown whether PAP can prevent and treat Cd-induced cardiomyocyte damages.The present study was desgined to explore the effect of PAP on Cd-induced damage in H9c2 cells based on MG53 and the mediated RISK pathway.For in vitro evaluation,cell viability and apoptosis rate were analyzed by CCK-8 assay and flow cytometry,respectively.Furthermore,oxidative stress was assessed by 2',7'-dichlorodihydrofluorescein diacetate(DCFH-DA)staining and using superoxide dismutase(SOD),catalase(CAT),and glutathione/oxidized glutathione(GSH/GSSG)kits.The mitochondrial function was measured by JC-10 staining and ATP detection assay.Western blot was performed to detect the expression of proteins related to MG53,the RISK pathway,and apoptosis.The results indicated that Cd increased the levels of reactive oxygen species(ROS)in H9c2 cells.Cd decreased the activities of SOD and CAT and the ratio of GSH/GSSG,resulting in decreases in cell viability and increases in apoptosis.Interestingly,PAP reversed Cd-induced oxidative stress and cell apoptosis.Meanwhile,Cd reduced the expression of MG53 in H9c2 clls and inhibited the RISK pathway,which was mediated by decreasing the ratio of p-Akt^(Ser473)/Akt,p-GSK3β^(Ser9)/GSK3β and p ERK1/2/ERK1/2.In addition,Cd impaired mitochondrial function,which involved a reduction in ATP content and mitochondrial membrane potential(MMP),and an increase in the ratio of Bax/Bcl-2,cytoplasmic cytochrome c/mitochondrial cytochrome c,and Cleaved-Caspase 3/Pro-Caspase 3.Importantly,PAP alleviated Cd-induced MG53 reduction,activated the RISK pathway,and reduced mitochondrial damage.Interestingly,knockdown of MG53 or inhibition of the RISK pathway attenuated the protective effect of PAP in Cd-induced H9c2 cells.In sum,PAP reduces Cd-induced damage in H9c2 cells,which is mediated by increasing MG53 expression and activating the RISK pathway.展开更多
目的对藏药蕨麻主要化学成分进行结构鉴定。方法采用大孔吸附树脂和硅胶柱色谱及HPLC制备色谱技术进行分离纯化,应用化学反应、热分析、光谱与电磁波谱综合解析,特别是一维和二维超导核磁共振技术,鉴定化合物的结构。结果从蕨麻首次分...目的对藏药蕨麻主要化学成分进行结构鉴定。方法采用大孔吸附树脂和硅胶柱色谱及HPLC制备色谱技术进行分离纯化,应用化学反应、热分析、光谱与电磁波谱综合解析,特别是一维和二维超导核磁共振技术,鉴定化合物的结构。结果从蕨麻首次分离纯化的3个化合物单体为五环三萜皂苷类成分,即2,α3,β19α-三羟基-齐墩果酸-28-O-β-D-葡萄糖苷(24-deoxy-sericos ide,Ⅰ)、2,α3,β19β-三羟基-乌苏酸-28-O-β-D-吡喃半乳糖苷(anseri-nos ide,Ⅱ)和2-羰基-3,β19α-二羟基-乌苏酸-28-O-β-D-葡萄糖苷(2-oxo-pom o lic ac id-βD-g lucopyranosy l ester,Ⅲ),其中化合物Ⅱ为新化合物(命名为蕨麻苷)。结论此3个化合物为首次从蕨麻中分离得到,其中蕨麻苷经鉴定为新化合物。展开更多
基金supported by the Natural Science Foundation of Tibet Autonomous Region(XZ202201ZR0012G)Quality Evaluation and Efficient Utilization of Effective Components of Potentilla anserine Resources in Tibet(XZ202201ZD0001N).
文摘Potentilla anserina L.(PA)belongs to the Rosaceae family,is a common edible plant in the Qinghai-Tibet Plateau areas of China.This study elucidates the mechanism upon which crude polysaccharide of PA(PAP)on fat accumulation in HepG2 cells stimulated by oleic acid(OA)and high fat high sugar induced mice.The result revealed that PAP inhibited lipid accumulation in obese mice and ameliorated the degree of damage in OA-induced HepG2 cells.Specifically,compared to the control group,the TG and TC levels were decreased in cells and mice serum,the aspartate transaminase and alamine aminotransferase contents were declined in liver of obese mice by PAP treatment.The expressions of adipogenic genes of SREBP-1c,C/EBPα,PPARγ,and FAS were inhibited after PAP treatment.Moreover,PAP increased the mRNA levels of CPT-1 and PPARα,which were involved in fatty acid oxidation.The present results indicated the PAP could alleviate the damage of liver associated with obesity and PAP treatment might provide a dietary therapeutic option for the treatment of hyperlipidemia.
基金supported by the Open Fund of Key Laboratory of Dunhuang Medicine,Ministry of Education(No.DHYX20-09)the Youth Research Foundation of Gansu University of Chinese Medicine(No.ZQ2017-14)+1 种基金the Natural Science Foundation of Gansu Province of China(No.20JR10RA600)the Young Doctors Fund Project of Colleges and Universities in Gansu Provine(No.2022QB-133)。
文摘Oxidative stress plays a crucial role in cadmium(Cd)-induced myocardial injury.Mitsugumin 53(MG53)and its mediated reperfusion injury salvage kinase(RISK)pathway have been demonstrated to be closely related to myocardial oxidative damage.Potentilla anserina L.polysaccharide(PAP)is a polysaccharide with antioxidant capacity,which exerts protective effect on Cd-induced damage.However,it remains unknown whether PAP can prevent and treat Cd-induced cardiomyocyte damages.The present study was desgined to explore the effect of PAP on Cd-induced damage in H9c2 cells based on MG53 and the mediated RISK pathway.For in vitro evaluation,cell viability and apoptosis rate were analyzed by CCK-8 assay and flow cytometry,respectively.Furthermore,oxidative stress was assessed by 2',7'-dichlorodihydrofluorescein diacetate(DCFH-DA)staining and using superoxide dismutase(SOD),catalase(CAT),and glutathione/oxidized glutathione(GSH/GSSG)kits.The mitochondrial function was measured by JC-10 staining and ATP detection assay.Western blot was performed to detect the expression of proteins related to MG53,the RISK pathway,and apoptosis.The results indicated that Cd increased the levels of reactive oxygen species(ROS)in H9c2 cells.Cd decreased the activities of SOD and CAT and the ratio of GSH/GSSG,resulting in decreases in cell viability and increases in apoptosis.Interestingly,PAP reversed Cd-induced oxidative stress and cell apoptosis.Meanwhile,Cd reduced the expression of MG53 in H9c2 clls and inhibited the RISK pathway,which was mediated by decreasing the ratio of p-Akt^(Ser473)/Akt,p-GSK3β^(Ser9)/GSK3β and p ERK1/2/ERK1/2.In addition,Cd impaired mitochondrial function,which involved a reduction in ATP content and mitochondrial membrane potential(MMP),and an increase in the ratio of Bax/Bcl-2,cytoplasmic cytochrome c/mitochondrial cytochrome c,and Cleaved-Caspase 3/Pro-Caspase 3.Importantly,PAP alleviated Cd-induced MG53 reduction,activated the RISK pathway,and reduced mitochondrial damage.Interestingly,knockdown of MG53 or inhibition of the RISK pathway attenuated the protective effect of PAP in Cd-induced H9c2 cells.In sum,PAP reduces Cd-induced damage in H9c2 cells,which is mediated by increasing MG53 expression and activating the RISK pathway.
文摘目的对藏药蕨麻主要化学成分进行结构鉴定。方法采用大孔吸附树脂和硅胶柱色谱及HPLC制备色谱技术进行分离纯化,应用化学反应、热分析、光谱与电磁波谱综合解析,特别是一维和二维超导核磁共振技术,鉴定化合物的结构。结果从蕨麻首次分离纯化的3个化合物单体为五环三萜皂苷类成分,即2,α3,β19α-三羟基-齐墩果酸-28-O-β-D-葡萄糖苷(24-deoxy-sericos ide,Ⅰ)、2,α3,β19β-三羟基-乌苏酸-28-O-β-D-吡喃半乳糖苷(anseri-nos ide,Ⅱ)和2-羰基-3,β19α-二羟基-乌苏酸-28-O-β-D-葡萄糖苷(2-oxo-pom o lic ac id-βD-g lucopyranosy l ester,Ⅲ),其中化合物Ⅱ为新化合物(命名为蕨麻苷)。结论此3个化合物为首次从蕨麻中分离得到,其中蕨麻苷经鉴定为新化合物。
